20357642653 has 8 divisors (see below), whose sum is σ = 20431801656. Its totient is φ = 20283609600.

The previous prime is 20357642623. The next prime is 20357642689. The reversal of 20357642653 is 35624675302.

It can be written as a sum of positive squares in 4 ways, for example, as 5290816644 + 15066826009 = 72738^2 + 122747^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20357642653 - 2¹³ = 20357634461 is a prime.

It is a super-2 number, since 2×20357642653² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20357642623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 298623 + ... + 360403.

It is an arithmetic number, because the mean of its divisors is an integer number (2553975207).

Almost surely, 2^20357642653 is an apocalyptic number.

It is an amenable number.

20357642653 is a deficient number, since it is larger than the sum of its proper divisors (74159003).

20357642653 is an equidigital number, since it uses as much as digits as its factorization.

20357642653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62975.

The product of its (nonzero) digits is 907200, while the sum is 43.

The spelling of 20357642653 in words is "twenty billion, three hundred fifty-seven million, six hundred forty-two thousand, six hundred fifty-three".